Structure 210110000000000 · Wagoner County, OK

N4120 over Adams Creek

Carries N4120 over Adams Creek, 4.6s Rog Cl On Oak Grove.

Overall conditionFair

Set by its lowest-rated component: Substructure at 5 of 9.

How ratings work
Deck6/9 · Satisfactory
Superstructure7/9 · Good
Substructuresets the rating5/9 · Fair
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT76 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 7/9Substructure 5/9 · sets the rating

76 ft end to end. Lengths and the car on the deck are drawn to the same scale. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a multi-beam bridge.

Built198541 years old
Length76.1 ft23.2 m
Daily traffic320counted 2022
Last inspectedAugust 2024every 12 months

Location

StateOklahoma
CountyWagoner
Location4.6s Rog Cl On Oak Grove
CarriesN4120
CrossesAdams Creek
Coordinates36.09607, -95.67254

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length76.1 ft (23.2 m)
Max Span73.8 ft (22.5 m)
Deck Width28.9 ft (8.8 m)
Deck Area204.2 sq m
Main Spans1
Year Built1985

Traffic

Avg Daily Traffic320 (2022)
Truck Traffic10%
Lanes On Bridge2

Inspection & Ownership

Last InspectionAugust 2024
Inspection FrequencyEvery 12 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical7 — Countermeasures installed
Structure Number210110000000000

How Bridge Ratings Work

Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."

0Failed
1Imminent failure
2Critical
3Serious
4Poor
5Fair
6Satisfactory
7Good
8Very good
9Excellent
Good · lowest component 7–9
Fair · lowest component 5–6
Poor · lowest component 0–4

A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.

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